Nine Inch Nails is the name of a music project by Trent Reznor and Atticus Ross, as well as the name of the band hired by them to perform songs while on tour. It is an industrial rock band, and the most recognized one since the genre was introduced. Before Ross's inclusion in 2016, Nine Inch Nails was solely under the creative direction of Trent Reznor.

Nine Inch Nails (commonly abbreviated as NIN) was formed in Cleveland, Ohio, circa 1988, and has so far released nine full-length studio albums, four EPs, seventeen singles, several remix collections, and some live material. Reznor's lyrics are largely concerned with the exploration of the self, but with albums such as Year Zero and The Slip, the lyrical focus shifted somewhat to extrospection. Earlier NIN material was created almost entirely by Reznor, but starting with The Fragile, he began to allow for a more collaborative writing process involving other players. The sonic ethos of NIN frequently juxtaposes electronic sounds with organic ones, and ugliness with beauty.

After recording a new album, the assembly of a new band usually follows, along with extensive touring; the live component of Nine Inch Nails is largely considered a separate entity from NIN in the recording studio. NIN's live shows often involve visually spectacular elements such as screens and lighting rigs, which have been used on the Self Destruct, Fragility, With Teeth Arena Tours (Fall & Spring), Performance 2007, Lights In The Sky and NIN 2013-2014 tours, and would sometimes culminate with the destruction of musical instruments.